Muffler for explosive-engines



E. E. WICKERSHAM. MUFFLER FOR EXPLOSWE ENINES.

APPLICATION HLED JULY 16, 1918.

1,344, 367, Patented June 22, 1920.

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well as decrease UNITED STATES PATENT OFFICE.

ELMER E. WICKEBSHAM, OF STOCKTON, CALIFORNIA, ASSIGNOB TO THE HOLT MANU-FACTURING COMPANY, OF STOCKTON,

FORNIA.

CALIFORNIA, A CORPORATION OF CALI- MUFFLER FOB EXPLOSIVE-ENGINES.

Application filed To all whom it may concern:

Be it known that I, ELMER E. WIGKER- SHAM, a citizen of the UnitedStates, residing at Stockton, in the county of San Joaquinand State ofCalifornia, have invented new and useful Improvement in Mufiiers forExplosive-Engines, of which the following is a specification.

This invention relates to an explosive engine, and particularly pertainsto a muflier therefor.

In view of the fact that the explosions within the cylinders of aninternal combustion engine produce loud and objectionable detonations,it is desirable to mufile the sound, at the same time allowing theexhaust ases to pass from the engine cylinders without obstruction.

It is the principal object of this inven tion to provide a simplemufliing device which may be readily disposed over the exhaust pipe ofan internal combustion engine, and through which exhaust gases may flowwithout obstruction, at the same time mutiling the sound of theexplosion as the gas violently rushes from the engine into thesurrounding atmosphere.

The present invention contemplates the use of a circular passagewayhaving a tangential inlet and an axial outlet and, further, formed witha pocket adapted to interrupt the gas and dissipate its force as thevibration of the sound waves therein.

Having reference drawings:

Figure 1 is a view in side elevation, illustrating the completelyassembled mufller.

Fig. 2 is a view in end elevation, illustratt e device as shown inFig. 1. i s. 3 and 4 are transverse v'ews disclosing t e tangentialinlet and the radial outlet openings as well as the intervening passaeway.

eferrin ings, 10 in to the accompanying more particularly to thedrawicates t e exhaust pipe of an ex plosive engine. This pipe iscommonly cy lindrical in section and in the resent instance is adaptedto be fitted wit a mufller 11. As a matter of convenience, both in assembly and manufacture, the muffler is made having complementary parts12 and 13. These parts are united along their contiguous edges bybolting lugs 14 and, when Specification of Letters Patent.

tial passageway by Patented June 22, 1920.

July 16, 1918. Serial No. 245,183.

combined, will be securely clamped around the outer end of the exhaustpipe.

The muflier halves are united to form a circular passageway 15 incommunication with the open end of the exhaust pipe by means of atangential passageway 16. This last named opening is arcuate and leadsfrom the end of the pipe which is preferably disposed in longitudinalalinement with the central axis of the muffler. The central axis of themufiler also coincides with the transverse axes of outlet openings 17formed through the opposite side walls of the muffler case. Theseopenings are preferably circular and are concentrically disposed inrelation to the main passageway 15.

Formed alongside of the inlet passageway 16 is a sound deadening chamber18. This chamber is separated from the tangenan arcuate wall 19 and isfurther separated from the main annular passageway 15 by an arcuatebaffle wall 20. This wall extends from the terminating end of the wall19 to a point adjacent to the side wall of the muflier, thus forming aninlet port 21. The wall 20 is substantially concentric with the axes ofthe openingslT. The port 21, leading into the chamber 18, istangentially disposed in relation to the path of trave of the fluidpassing through the muflier and thus tends to dissipate the force of thegases rushing therethrough to deaden the sound produced by the gas as itis emitted from the openings 17 in the case.

In operation, the exhaust gases from the engine will pass into thetangential passageway 16 with great violence and will thereafter bedirected in a circulatory path of travel around the annular confiningwall of the passageway 16. This will produce a gyrating motion of thegas as it circumscribes the axes of the openings 17 A centrifugal actionwill be thus im arted to the gas to retard it in its flow. l his gyratinmotion will be decreased, due to the fact t at some of the gas will passinto the sound deadening chamber 18 and there be muflled. A back ressureof this gas in this chamber will .urther retard the movement of the mainbody of gas and decrease its sound and will finally change its path oftravel from a circulatory one to an axial one, thereafter flowingoutwardly through the opposite openings 17 in the case. Due to thepeculiar formation of the case and the manner in which the gas isafforded a long path of travel the violence of the explosion will bedissipated and the gas will pass out into the atmosphere withoutprodurin r an objectionable detonation. Incidental y the chamber 13 willgather the particles of carbon and extinguish and entrap the flame whichwould otherwise pass out through the unit'- tier.

It will thus be seen that the structure here disclosed while decidedlysimple in its formation will effectually reduce the rate of travel ofexhaust gases from explosive engines and affect these gases in a mannerto dissipate the detonations incident to the explosions within theengine cylinders and the exhaust therefrom.

Having thus described my imention, what I claim and desire to secure byLetters latout is 1. A mnlller for explosive engines com prising ahollow casing adapted to he disposed in communication with the end of anexhaust pipe, an annular passageway within the casing formed with aperipheral inlet opening, a sound deadening chamber in closed within thecasing having its opening tangentially disposed to th path of travel ofgas, and axial outlet port owned in the opposite sides of the casingall.

2. A mufller for explosive engines having a circular passageway formedwith an inlet opening at the periphery and oppositely disposed axialoutlet ports, and a sound-deadening chamber disposed in tangentialrelation to the path of travel of gas flowing throu h the passageway andoutwardly through t e axial )orts.

3. l mufller for explosive engines comprising a casing having acylindrical chamber, an inlet at the periphery of said easing radiallydisposed, oppositely disposed outlet openings at the center axiallythereof and a sound deadening chamber communicating with saidcylindrical chamber and disposed in the path of travel of the gases,said sound deadening chamber heing arranged at a point greater than 180"from the inlet.

4. A mufller for explosive engines comprising a casing having acylindrical chamher, an inlet at the periphery of said casing radiallydisposed, oppositely disposed outlet openings at the center axiallythereof, a sound deadening chamber connnnnicating with said cylindricalchamber and disposed in the path of travel of the gases, said sounddeadening chamber being arranged at a point greater than 181) from theinlet, and means in the form of a ballle plate at the entrance of saidsound deadening chamber for assisting in the separation of the solidsfrom the gas and isolating said solids after the same have beenseparated.

lnulller for explosive engines comprising a casing having a cylindricalchain her, an inlet at the periphery of said casing radially disposed,oppositely disposed out let openings at the center axially thereof, asound deadening chamber conunnnicating with said cylindrical chamber anddisposed in the path of travel of the gases, said sound d adeningchamber being arranged at a point greater than 1 from the inlet, meansin the form of a ballle plate at the entrance of said sound deadeningchamber for assisting in the separation of the solids from the gas andisolating said solids after the same have been separated, and means nocessible from the exterior of the muflier for exposing the contents ofsaid sound deadening chamber to permit cleaning of the latter.

In testimony whereof I have hereuntoset my hand in the presence of twosubscribing witnesses.

ELMER- E. WIGKERSHAM.

\Vitnesses F. W. Tami, DAVID B. LYMANN.

